Build system for at-spi2-core package have auto detection
of x11 dependency since version 2.26.1. Remove the hardcoded
dependency in the recipe and let DISTRO_FEATURES decide.
(From OE-Core rev: e80bfa6bdfc1ad97c6232f8387d1bf8a8c7a8b20)
Signed-off-by: Peter Bergin <peter@berginkonsult.se>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>